#include "RR.h"
#include <stdio.h>
#include <stdlib.h>

/**
 * 函数: calculateTimes
 * 功能: 根据时间片轮转调度算法计算每个进程的完成时间、周转时间和等待时间
 *
 * 参数:
 *  - processes: 指向包含多个进程信息的数组
 *  - n: 进程数量
 *  - time_slice: 时间片长度
 *
 * 描述:
 *  计算进程的完成时间，周转时间和等待时间并存在结构体中即可
 */
void
calculateTimes (Process *processes, int n, int time_slice)
{
  int remaining_process_count = n;
  int current_time = 0;
  while (remaining_process_count > 0) {
    // Traverse the process array
    for (int i = 0; i < n; i++) {
      if (processes[i].remaining_time > 0) {
        if (current_time < processes[i].arrival_time) {
          continue;
        }
        // Try running a slice
        if (processes[i].remaining_time <= time_slice) {
          // Complete a process
          remaining_process_count--;
          current_time += processes[i].remaining_time;
          processes[i].remaining_time = 0;
          processes[i].completion_time = current_time;
          processes[i].turnaround_time = processes[i].completion_time - processes[i].arrival_time;
          processes[i].waiting_time = processes[i].turnaround_time - processes[i].burst_time;
        } else {
          current_time += time_slice;
          processes[i].remaining_time -= time_slice;
        }
      }
    }
  }
}
